Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"memory guided"”.
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Characterizing the Brain Dynamics and Eye Movement Behavior of Memory-Guided Saccades: a Preliminary Investigation of Distractor Influence on Memory-Guided Saccades
… and neural mechanisms of distractors on memory-guided saccades. In our current study we have utilized eye tracking and EEG technology to simultaneously record the changes in saccadic eye movement (SEM) behavior and event-related potentials (ERPs) associated with performance on a …
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Explicit Attention to Allocentric Landmarks Improves Memory-Guided Reaching
… egocentric versus allocentric cues) influences memory-guided reaching. Here, 13 participants performed a task with two instruction conditions (egocentric vs. allocentric), but with similar sensory and motor conditions. In the allocentric condition, participants were instructed to remember the …
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Long-Term Memory Biases Auditory Spatial Attention: Healthy and Impaired “Memory-Guided Attention”
Attention and memory may be impaired in individuals at-risk for Alzheimer’s disease (AD), though standard cognitive assessments typically study the two in parallel. In reality, attention and memory interact to facilitate processing, and thus a more integrative approach is required. Here, I used a …
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Ready for Action! When the Brain Learns, Yet Memory-Guided Behavior Does Not Follow
The ability to use memory for action is critical for everyday life, such as for remembering which alarm signals danger. Although research suggests that memory for past events influences how we respond to events in the present, the magnitude of behavioral benefit varies and can even be absent. How …
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Optogenetic disruption of memory-drive, oculomotor behavior in the non-human primate
… their firing rate during the three epochs of the memory-guided saccade task: visual stimulus presentation, the delay interval, and motor preparation. It is unclear, though, whether FEF activity during each epoch is necessary for memory-guided saccade execution. To address this question, techniques …
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Spatial-memory control of defensive actions
… of mouse instinctive defensive behaviours on memory of the spatial environment, and the neural mechanisms responsible for accurate escape towards refuge. First, using behavioural assays, I show that the choice and execution of defensive behaviours rely on rapidly acquired memory and are …
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THE EFFECTS OF PARKINSON’S DISEASE AND ASSOCIATED TREATMENTS ON SACCADIC EYE MOVEMENTS
… Trends in an increase in performance for the memory-guided (MGS) and antisaccade tasks were also seen. A perceptual vortex was uncovered in the antisaccade task, supporting the idea that decrease in cognitive control can impair one’s ability to overcome the sensory pull of a salient stimulus.
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Deficits in eye movement control in children with 22q11.2 deletion syndrome.
… completed prosaccade, antisaccade, delayed memory-guided sequential (DMS) and predictive eye movement tasks. Results: Compared to controls, children with 22q11.2 DS exhibited increased direction errors in the antisaccade task, increased timing errors in the DMS task, as well as decreased …
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A Scent of Direction: Exploring Adaptive Olfactory Navigation in Drosophila
… integrating sensory input with spatial memory and internal representations of their surroundings, remains unclear. A key challenge in studying olfactory navigation lies in the invisible and unpredictable nature of odor plumes, which has made it challenging to accurately assess the …
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Investigating Gaze Orientation and Spatial Localization in Strabismus
… in two adult exotropic monkeys while performing memory saccade tasks with variable delays to assess influence on persistence of visual information on fixation-preference. Results: Aim 1: Monkeys reared with prisms during infancy developed strabismus as early as 3 weeks of age (~3 months in …
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Sensorimotor transformation and information coding across cortex during perceptual decisions
… frontal motor (fMC) cortices of mice during a memory-guided visual decision task. Large-scale calcium imaging revealed that neurons in each area were heterogeneous and spanned all task epochs (stimulus, delay, response). However, information encoding was distinct across regions, with V1 …
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Sakkadenhypometrie bei Morbus Parkinson : ein Maß für die gestörte interne Bewegungskontrolle
1. Blicksprünge (Sakkaden) von Parkinsonpatienten haben unter bestimmten Bedingungen ein charakteristisches Muster. Die erste Sakkade ist zu klein, mit einigen Korrektursakkaden wird das Ziel jedoch erreicht. Dieses Muster wird auch “multiple step pattern” (MSP) genannt. Unter verschiedenen …
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Quantification of neural substrates of vergence system via fMRI
… but not for the saccade data set. The novel memory-guided vergence experiment also showed a relationship between posterior parahippocampal area and memory where two other experiments were implemented for comparison of memory load in this region. Significant percent change in the functional …
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Effects of acute alcohol intoxication on visual processing and oculomotor control
… (automated) incorporates implicit learning and memory processes that can influence reflexive behavior, but are still unconscious. This level was examined using the double step paradigm. The highest processing level represents voluntary modification of behavior and was studied using two versions …
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Organization of spatiotemporal information and relational memory in the hippocampus
… the role of the hippocampus and relational memory in organizing episodic memory during navigation and reconstruction. Navigation is a critical component in most organisms’ survival. Reconstruction, on the other hand, provides an incredibly rich method of evaluating the precise information …